This product was designed for use in large sound bags or small location carts. The power distributor can be connected to any battery type (SLA, NI-MH or LI-ION) and the fuel gauge provides all the information required to monitor the battery's state of charge (voltage, current, power, etc). The eSMART BG-DU uses an internal coulomb counter and a calibration routine to measure the battery's true capacity and display its remaining capacity in real time. This power distributor is also fully compatible with Audioroot's full line of Li-XXwh smart batteries. A stainless steel clip is included and can be mounted on the top or bottom of the unit for easy attachment in a sound bag.